I used a Phantom 3 Advanced for this survey, with 4 batteries and a vehicle power converter so I could charge out in the field.

There was a total of 9 flights, with the drone flying 70 meters AGL (was going for max. visual quality) and 2024 pictures taken!

The day before was spent laying out GCP's. There was a total of 41 GCP's laid out and identified for this project.

Quality was my number one priority. I wanted to be able to identify as many features as I could - each panel that was used to line the dam with, how many meters of cement curbing was used to seal the upstream toe of the dam... etc

This survey was one of many done of this facility. All of our contractor payouts came down to the use of drone surveys.

In the images below you will see the camera locations, the 3d textured mesh and then a close up of a random area.

Everything looks crisp and clean - which was import due to costing methodologies.